Double-seal envelop.



L. KITTKA.

DOUBLE SEAL BNVELOP.

APPLICATION FILED 11116.31. 1914.

1,126,784. Patenteareb. 2, 1915.

Fig. 2

@Oi/humo@ Y L www NiTiiD sTATEs PATENT onirica.

LOUIS KITTKA, OF JOHNSTOWN, PENNSYLVANIA, ASSIGNOR 0F ONE-HALF TO JOSEPH HOFFMAN, OF JOHNSTOWN, PENNSYLVANIA.

DOUBLE-SEAL ENVELOP.

To all whom z'mag/ concern Be it known that I, LoUrs KITTKA, subject of the Emperor of Austria-Hungary, residing at Johnstown,in the county of Cambria and State of Pennsylvania, have invented certain new and useful Improvements in `Double-Seal Envelops, of which the following is a specification.

This invention relates to certain new and useful improvements in double seal envelops.

The primary object of this invention is to provide an envelop container with la doubly sealed closure formed by a sealing rib in connection with an over-lapping sealing reinforcing iap.

A further object is to provide an'envelop formed of a single piece blank andhaving one flap thereof folded into a sealing rib and the remainder of said flap adapted for sealing over the entire envelop side reinforcing the latter and sealing the said rib beneath the flap.

With these general objects in view and others that will appear as the nature of the invention is better understood, the same consists inthe novel combination and arrangement of parts to be hereinafter more fully described, illustrated in the accompanying drawing, .and set forth in the appended claim.

In the drawings' forming a part of this application and in which like-designating characters refer to corresponding parts throughout the several views, Figure 1 is a perspective view of the envelop in its open position. Fig. 2 is a plan view of the inner side of the unfolded envelop blank. Fig. 3 is a similar view of the outer side of the blank upon which the envelop is formed. Fig. 4 is a transverse sectional View of the envelop in its open position. Fig. 5 is'a similar view of the envelop in its sealed closed position, and Fig. 6 is a longitudinal sectional view through the unclosed envelop container body.

Referring more`in detail to the drawing the blank 10 is constructed from a single piece of sheet material such as paper or cloth and the same is foldable upon the dotted lines illustrated in Figs. l and 2 for forming the complete improved envelop.

The invention consists in the double sealing features of the device, while the' container portion 11 is formed in the usual mannerV by providingV exteriorly gummeol Specication of Letters Patent.

Patented Feb. 2, 1915..

Application filed August 31, 1914. Serial No. 859,438.'

tioned at the opposite end thereof from the v wall fiap 14 and this Hap 15 which may be rectangular or of other similar shape constitutes the sealing iiap for closing the envelop body. The flap 15 is creased as indicated by the dotted line 16 at its point of connection with the front wall portion 13 thus allowing the flap t'o/ be folded along said line, while similar creasings equally spaced apart and in parallelism are provided as indicated'by the dotted lines 17 and 18 thus forming equal sized strip portions 19 at either side of the intermediately positioned crease 17. The strips 19 are provided with an adhesive upon their outer sides as shown in Fig. 3,' which is serviceable in securing the said strips 19 together and folded upon one another with their outer faces in contact with each other, and in which positions, the longitudinal projecting rib 20 is formed` as illustrated in Fig. 1 and which is at` the base of the sealing flap 15, and adjacent the open mouth 21 of the envelop body.

The rib 2O is provided with an adhesive upon its inner face 22 as illustrated in Figs. 1 and 2.and whereby the said rib is adapt ed to be folded over upon the rear wall 14, thus sealing the said rib upon the said wall and over the envelop mou-th 21. The Hap 15 is provided with a gummed surface 23 around its entire edge upon the inner face of the flap and whereby the flap may be adhesively secured to the outer. face of the envelop wall 14 as best illustrated in Fig. 5, and thus not only additionally sealing the envelop and inclosing the. sealing rib 20 therebeneath, but also forming a reinforcement for the rear envelop wall. The outer face 24'of the rib 20 is ungummed allowving the insertion of an opening instrument.

While the forms of the invention herein shown and described are what are believed to be the preferred embodiments thereof, minor changes may be made therein without departing from the spirit and scope of the invention as set forth in the claim.

What I claim as new is the flap operating to inclose the rib when l0 An envelop comprising a sealing Hap adthe envelop is in sealed condition. jacent to its mouth, and having an adhesive In testimony whereof I affix my signature uon inrfier face adtjaoen: to tlJ frele in presence of two witnesses. e ges ereo a narrow Wo-p y mou 1 sea T ingI rib between the flap and envelop and Y LOUIS KITTKA having an adhesive upon its inner face, the Witnesses: rib and flap having their inner faces con- GEO. R. KITTKA', tacting with the rear wall of the envelop, JOHN T. KACSIK. 

